Summary: Completion module for fish shell

Description:
fish allows completion of option arguments to come from an external
command, e.g.:

% complete -c deluser -l user -d Username -a "(cat /etc/passwd|cut -d : -f 1)"

The command is supposed to return completion entries one in a separate
line. Description for each entry can be added, prefixed with a tab
character. The provided function 'format_completion()' accept a completion
answer structure and format it for fish. Example:

URL: http://metacpan.org/release/Complete-Fish
License: GPLv1+ or Artistic

Maintainer: nobody